Jennifer Ouellette is the author of "The Calculus Diaries "and other titles, and maintains the "Cocktail Party Physics "blog. She lives in Los Angeles, California.

Karen Saltus has narrated television and radio commercials, audiobooks, textbooks, multimedia, film, and voice prompts for interactive telephone applications. She began her career thirty years ago at a radio station in Portland, Maine. She later became a creative director for a station in Massachussetts. In 1994 she became a full-time freelance voice-over talent.